1. What design options are available to reduce cooling demand charges?

1. What are the four basic principles for water treatment?

1. What applications are most efficient for solar collector systems? Why? Based on your answer, why is passive solar heating the most efficient application for solar energy?

1. What is the function of a diffuser in an HVAC distribution system?

1. What factors are considered in selecting pipe size for fluid flow applications?

1. What are the main advantages and disadvantages of plastic piping in comparison with steel?

1. What is the purpose of a check valve?

1. Why is a flushometer required for water closets in lieu of flush tanks in public facilities?

1. What is the purpose of a drainage trap? Do water closets require traps?